---
title: "isDaylightSavingTime(for:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nstimezone/isdaylightsavingtime(for:)"
---

# isDaylightSavingTime(for:)

Indicates whether the receiver uses daylight saving time on a given date.

## Declaration

```swift
func isDaylightSavingTime(for aDate: Date) -> Bool
```

## Parameters

- `aDate`: The date against which to test the receiver.

## Return Value

Return Value true if the receiver uses daylight saving time at aDate, otherwise false.

## See Also

### Working with Daylight Savings

- [isDaylightSavingTime](foundation/nstimezone/isdaylightsavingtime.md)
- [daylightSavingTimeOffset](foundation/nstimezone/daylightsavingtimeoffset.md)
- [daylightSavingTimeOffset(for:)](foundation/nstimezone/daylightsavingtimeoffset(for:).md)
- [nextDaylightSavingTimeTransition](foundation/nstimezone/nextdaylightsavingtimetransition.md)
- [nextDaylightSavingTimeTransition(after:)](foundation/nstimezone/nextdaylightsavingtimetransition(after:).md)